Big Blue Mini Wireless Travel Speaker Wireless Bluetoothconnectivity Water resistant for big outdoor sound Full-range speaker and passive radiator Rechargeable battery lasts up to 4 hours Compact and packableonly 3" in diameter Pair easily with Bluetoothenabled smartphones, tablets and music players NFC pairingsimply touch your device to Big Blue Minifor instant wireless pairing Weatherproof and water resistant for big sound, indoors or out Full-range speaker and passive radiator for extra bass Rechargeable battery lasts up to 4 hours on a single charge Compact and packableonly 3&#034; in diameter